For $\large A\, + \,B\, \rightleftharpoons \,C + D$ , $\large \Delta H\, = \, - QKJ$ , K_f and K_b respectively are 0.25 and 5000 at 400K. Now, K_c for same process at 500K may be

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

$5.2 \times 10^{- 5}$

$4.5 \times 10^{- 4}$

$5 \times 10^{- 5}$

$4 \times 10^{- 5}$

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

A + B $⇌$ C + D, ΔH = -QKJ

At 400 K K_f = 0.25; K_b = 5000

The reaction is exothermic at higher temperature, 500 K value of K_eq will be lesser than $\large 5 \times {10^{ - 5}}$

By inspection option (1) is the only value which is lesser than $\large 5 \times {10^{ - 5}}$

Watch 3-min video & get full concept clarity

JEE

NEET

Foundation JEE

Foundation NEET

CBSE